California Pistachios are a snack favorite of ours! Pistachios are one of the most nutritious nuts. A one ounce serving of pistachios is only 160 calories and gives you more than 30 different vitamins, minerals, and other beneficial nutrients. Pistachios are a great source of copper, manganese and phosphorous that help build strong bones. They also contain significant amounts of potassium and magnesium that help regulate heart rate and blood pressure. Pistachios are full of antioxidants that help prevent cell damage.